There appear to be some errors with Thought attachments in the latest Pro version (22.214.171.124). Have just added a link to a webpage and it does not show on the plex. If I add a second hyperlink both show in the plex. If I delete one, it again does not show (so not a workaround).
Earlier today I also had an issue where with two internal files attached, one icon showed a PDF type when the file was a JPG. The other file was a PDF and correctly had the same icon. Checked my Windows XP file types and the JPG file showed correctly in Explorer and other software so just TheBrain is confusing the type (bleeding from the other file type?).
Windows XP Professional 32bit